ARTICLE: { "regexp" "syntax" } "Regular expression syntax"
"Regexp syntax is largely compatible with Perl, Java and extended POSIX regexps, but not completely. Below, the syntax is documented."
{ $heading "Characters" }
-"At its core, regular expressions consist of character literals. For example, " { $snippet "R/ f/" } " is a regular expression matching just the string 'f'. In addition, the normal escape codes are provided, like " { $snippet "\\t" } " for the tab character and " { $snippet "\\uxxxxxx" } "for an arbitrary Unicode code point, by its hex value. In addition, any character can be preceded by a backslash to escape it, unless this has special meaning. For example, to match a literal opening parenthesis, use " { $snippet "\\(" } "."
+"At its core, regular expressions consist of character literals. For example, " { $snippet "R/ f/" } " is a regular expression matching just the string 'f'. In addition, the normal escape codes are provided, like " { $snippet "\\t" } " for the tab character and " { $snippet "\\uxxxxxx" } " for an arbitrary Unicode code point, by its hex value. In addition, any character can be preceded by a backslash to escape it, unless this has special meaning. For example, to match a literal opening parenthesis, use " { $snippet "\\(" } "."
{ $heading "Concatenation, alternation and grouping" }
"Regular expressions can be built out of multiple characters by concatenation. For example, " { $snippet "R/ ab/" } " matches a followed by b. The " { $snippet "|" } " (alternation) operator can construct a regexp which matches one of two alternatives. Parentheses can be used for gropuing. So " { $snippet "R/ f(oo|ar)/" } " would match either 'foo' or 'far'."
{ $heading "Character classes" }
{ { $snippet "\\p{blank}" } "Non-newline whitespace" }
{ { $snippet "\\p{cntrl}" } "Control character" }
{ { $snippet "\\p{space}" } "Whitespace" }
- { { $snippet "\\p{xdigit}" } "Hexidecimal digit" }
+ { { $snippet "\\p{xdigit}" } "Hexadecimal digit" }
{ { $snippet "\\p{Nd}" } "Character in Unicode category Nd" }
{ { $snippet "\\p{Z}" } "Character in Unicode category beginning with Z" }
{ { $snippet "\\p{script=Cham}" } "Character in the Cham writing system" } }
-USING: help.syntax help.markup strings ;
+! Copyright (C) 2009 Daniel Ehrenberg
+! See http://factorcode.org/license.txt for BSD license.
+USING: help.syntax help.markup strings biassocs arrays ;
IN: simple-flat-file
ABOUT: "simple-flat-file"
ARTICLE: "simple-flat-file" "Parsing simple flat files"
-"The " { $vocab-link "simple-flat-file" } " vocabulary provides words for loading and parsing simple flat files in a particular format which is common for encoding tasks."
-{ $subsection flat-file>biassoc } ;
+"The " { $vocab-link "simple-flat-file" } " vocabulary provides words for loading and parsing simple flat files in a particular format which is common for encoding and Unicode tasks."
+{ $subsection flat-file>biassoc }
+{ $subsection load-interval-file }
+{ $subsection data } ;
+
+HELP: load-interval-file
+{ $values { "filename" string } { "table" "an interval map" } }
+{ $description "This loads a file that looks like Script.txt in the Unicode Character Database and converts it into an efficient interval map, where the keys are characters and the values are strings for the properties." } ;
+
+HELP: data
+{ $values { "filename" string } { "data" array } }
+{ $description "This loads a file that's delineated by semicolons and lines, returning an array of lines, where each line is an array split by the semicolons, with whitespace trimmed off." } ;
+
+HELP: flat-file>biassoc
+{ $values { "filename" string } { "biassoc" biassoc } }
+{ $description "This loads a flat file, in the form that many encoding resource files are in, with two columns of numeric data in hex, and returns a biassoc associating them." } ;
! Copyright (C) 2009 Daniel Ehrenberg
! See http://factorcode.org/license.txt for BSD license.
USING: sequences splitting kernel math.parser io.files io.encodings.utf8
-biassocs ascii ;
+biassocs ascii namespaces arrays make assocs interval-maps sets ;
IN: simple-flat-file
: drop-comments ( seq -- newseq )
: data ( filename -- data )
utf8 file-lines drop-comments [ split-; ] map ;
+
+SYMBOL: interned
+
+: range, ( value key -- )
+ swap interned get
+ [ = ] with find nip 2array , ;
+
+: expand-ranges ( assoc -- interval-map )
+ [
+ [
+ swap CHAR: . over member? [
+ ".." split1 [ hex> ] bi@ 2array
+ ] [ hex> ] if range,
+ ] assoc-each
+ ] { } make <interval-map> ;
+
+: process-interval-file ( ranges -- table )
+ dup values prune interned
+ [ expand-ranges ] with-variable ;
+
+: load-interval-file ( filename -- table )
+ data process-interval-file ;
arrays namespaces make math.ranges unicode.normalize
unicode.normalize.private values io.encodings.ascii
unicode.syntax unicode.data compiler.units fry
-alien.syntax sets accessors interval-maps memoize locals words ;
+alien.syntax sets accessors interval-maps memoize locals words
+simple-flat-file ;
IN: unicode.breaks
<PRIVATE
VALUE: word-break-table
-"vocab:unicode/data/WordBreakProperty.txt" load-key-value
+"vocab:unicode/data/WordBreakProperty.txt" load-interval-file
to: word-break-table
C-ENUM: wOther wCR wLF wNewline wExtend wFormat wKatakana wALetter wMidLetter
ABOUT: "unicode.data"
ARTICLE: "unicode.data" "Unicode data tables"
-"The " { $vocab-link "unicode.data" "unicode.data" } " vocabulary contains core Unicode data tables and code for parsing this from files."
+"The " { $vocab-link "unicode.data" "unicode.data" } " vocabulary contains core Unicode data tables and code for parsing this from files. The following words access these data tables."
{ $subsection canonical-entry }
{ $subsection combine-chars }
{ $subsection combining-class }
{ $subsection name>char }
{ $subsection char>name }
{ $subsection property? }
-{ $subsection load-key-value } ;
+{ $subsection category }
+{ $subsection ch>upper }
+{ $subsection ch>lower }
+{ $subsection ch>title }
+{ $subsection special-case } ;
HELP: canonical-entry
{ $values { "char" "a code point" } { "seq" string } }
{ $values { "char" "a code point" } { "property" string } { "?" "a boolean" } }
{ $description "Tests whether the code point is listed under the given property in PropList.txt in the Unicode Character Database." } ;
-HELP: load-key-value
-{ $values { "filename" string } { "table" "an interval map" } }
-{ $description "This loads a file that looks like Script.txt in the Unicode Character Database and converts it into an efficient interval map, where the keys are characters and the values are strings for the properties." } ;
+HELP: category
+{ $values { "char" "a code point" } { "category" string } }
+{ $description "Returns the general category of a code point, in the form of a string. This will always be a string within the ASCII range of length two. If the code point is unassigned, then it returns " { $snippet "Cn" } "." } ;
+
+HELP: ch>upper
+{ $values { "ch" "a code point" } { "upper" "a code point" } }
+{ $description "Returns the simple upper-cased version of the code point, if it exists. This does not handle context-sensitive or locale-dependent properties of linguistically accurate case conversion, and does not correctly handle characters which become multiple characters on conversion to this case." } ;
+
+HELP: ch>lower
+{ $values { "ch" "a code point" } { "lower" "a code point" } }
+{ $description "Returns the simple lower-cased version of the code point, if it exists. This does not handle context-sensitive or locale-dependent properties of linguistically accurate case conversion, and does not correctly handle characters which become multiple characters on conversion to this case." } ;
+
+HELP: ch>title
+{ $values { "ch" "a code point" } { "title" "a code point" } }
+{ $description "Returns the simple title-cased version of the code point, if it exists. This does not handle context-sensitive or locale-dependent properties of linguistically accurate case conversion, and does not correctly handle characters which become multiple characters on conversion to this case." } ;
+
+HELP: special-case
+{ $values { "ch" "a code point" } { "casing-tuple" { "a tuple, or " { $link f } } } }
+{ $description "If a code point has special casing behavior, returns a tuple which represents that information." } ;
PRIVATE>
-: category# ( char -- category )
+: category# ( char -- n )
! There are a few characters that should be Cn
! that this gives Cf or Mn
! Cf = 26; Mn = 5; Cn = 29
[ name>char [ "Invalid character" throw ] unless* ]
name>char-hook set-global
-
-SYMBOL: interned
-
-: range, ( value key -- )
- swap interned get
- [ = ] with find nip 2array , ;
-
-: expand-ranges ( assoc -- interval-map )
- [
- [
- swap CHAR: . over member? [
- ".." split1 [ hex> ] bi@ 2array
- ] [ hex> ] if range,
- ] assoc-each
- ] { } make <interval-map> ;
-
-: process-key-value ( ranges -- table )
- dup values prune interned
- [ expand-ranges ] with-variable ;
-
-PRIVATE>
-
-: load-key-value ( filename -- table )
- data process-key-value ;
! Copyright (C) 2008 Daniel Ehrenberg.
! See http://factorcode.org/license.txt for BSD license.
-USING: accessors values kernel sequences assocs io.files
-io.encodings ascii math.ranges io splitting math.parser
-namespaces make byte-arrays locals math sets io.encodings.ascii
-words words.symbol compiler.units arrays interval-maps
-unicode.data ;
+USING: values interval-maps simple-flat-file ;
IN: unicode.script
<PRIVATE
VALUE: script-table
-"vocab:unicode/script/Scripts.txt" load-key-value
+"vocab:unicode/script/Scripts.txt" load-interval-file
to: script-table
PRIVATE>
! See http://factorcode.org/license.txt for BSD license.
USING: unicode.data kernel math sequences parser lexer
bit-arrays namespaces make sequences.private arrays quotations
-assocs classes.predicate math.order strings.parser ;
+assocs classes.predicate math.order strings.parser sets ;
IN: unicode.syntax
<PRIVATE
: CATEGORY:
CREATE ";" parse-tokens define-category ; parsing
-: seq-minus ( seq1 seq2 -- diff )
- [ member? not ] curry filter ;
-
: CATEGORY-NOT:
CREATE ";" parse-tokens
- categories swap seq-minus define-category ; parsing
+ categories swap diff define-category ; parsing
projects / factor.git / commitdiff